<?php // $Id: view_xml.class.php,v 1.4 2007/10/10 05:25:23 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards Martin Dougiamas		http://dougiamas.com  //
//		   (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

/// This class will display one XML file

class view_xml extends XMLDBAction {

	/**
	 * Init method, every subclass will have its own
	 */
	function init() {
		parent::init();
	/// Set own core attributes
		$this->can_subaction = ACTION_NONE;
		//$this->can_subaction = ACTION_HAVE_SUBACTIONS;

	/// Set own custom attributes

	/// Get needed strings
		$this->loadStrings(array(
		/// 'key' => 'module',
		));
	}

	/**
	 * Invoke method, every class will have its own
	 * returns true/false on completion, setting both
	 * errormsg and output as necessary
	 */
	function invoke() {
		parent::invoke();

		$result = true;

	/// Set own core attributes
		$this->does_generate = ACTION_GENERATE_XML;

	/// These are always here
		global $CFG, $XMLDB;

	/// Do the job, setting result as needed

	/// Get the file parameter
		$file = required_param('file', PARAM_PATH);
		$file = $CFG->dirroot . stripslashes_safe($file);
	/// File must be under $CFG->wwwroot and
	///  under one db directory (simple protection)
		if (substr($file, 0, strlen($CFG->dirroot)) == $CFG->dirroot &&
			substr(dirname($file), -2, 2) == 'db') {
		/// Everything is ok. Load the file to memory
			$this->output = file_get_contents($file);
		} else {
		/// Switch to HTML and error
			$this->does_generate = ACTION_GENERATE_HTML;
			$this->errormsg = 'File not viewable (' . $file .')';
			$result = false;
		}

	/// Return ok if arrived here
		return $result;
	}
}
?>
